Haproxy + keepalived + ipv6

This a bit of-topic I guess, but I am looking for documentation / info /howto on how to do a setup with haproxy as the load balancers and use keepalive as the Fail Over/High Availability mechanism between 2 haproxy servers for IPv6.

I found a few that shows this with IPv4 and using floating ipv4, which is fine, but I am not able to find anything for a similar setup for IPv6. Anybody got any pointers for where to look? My google fu has been weak in searching for this.